This project uses an HC-SR04 ultrasonic sensor to measure how close an object is. A buzzer and LED react depending on the distance, similar to a car parking sensor. < 10 cm → buzzer and LED stay on.

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Abstract: This letter presents a real-time bed-exit alarm system using ultrasonic sensors, infrared (IR) sensors, and an accelerometer. The ultrasonic sensors detect the elderly in bed; the IR sensors ...

Abstract: Ultrasonic guided wave detection technology is one of the most effective damage identification methods in structural health monitoring (SHM), but external factors will cause errors during ...

As a thank you to loyal members, the National Trust has a 25 per cent concession for senior members aged 60 or over who have been members for at least three consecutive years. Save £24 or more ...

Meta is opening its AI-powered smart glasses to third-party developers, announcing a new ‘Wearables Device Access Toolkit’ that will allow mobile apps to tap into the devices’ cameras, microphones, ...